Electromotor

a technology of electromotors and cooling air, applied in the field of electromotors, can solve the problems of shortening the life of the electromotor, affecting the efficiency of the electromotor, and the effect of only achieving a very limited effect of cooling air flow, so as to improve the cooling effect of the electromotor and increase the thermal robustness

Active Publication Date: 2011-07-12
BROSE FAHRZEUGTEILE GMBH & CO KG HALLSTADT (DE)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The task of the invention is to improve the cooling of an electromotor and thus to increase its thermal robustness. According to an embodiment, an electromotor may comprise a rotor rotatably mounted on a rotor axle and a fixed stator in the inside of a motor housing and a ventilator vessel, wherein the ventilator vessel is fixably or in torque proof fashion connected with the rotor and at least partially encompasses the motor housing in the shape of a pot, in such a way that an air gap with an air gap opening is formed between the outer wall of the motor housing and the wall of the ventilator vessel, wherein the motor housing has ventilation openings both outside and inside the air gap and the ventilator vessel has moldings,

Problems solved by technology

To disregard this can result in the life of the electromotor being shortened or to a complete breakdo

Method used

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Embodiment Construction

[0014]The invention is based on the principle of improving the cooling of an electromotor by also using the motor housing encasing the electromotor as a heat sink to dissipate the lost heat from the winding to a cooling air flow. To do this, the cooling air flow is directed through the motor housing and in an air gap between a ventilator vessel and along the exterior of the motor housing.

[0015]According to an embodiment, the electromotor has a rotating internal rotor and a fixed, electromagnetically excited external stator with a winding. As opposed to an electromotor with a permanently excited external stator, here the lost heat from the winding and the electromagnetically charged iron material is dissipated outwards directly to the motor housing, which is connected with the external stator in a heat-conductive manner.

[0016]According to an embodiment, the cooling air flow is formed during operation by the ventilator vessel driven by the electromotor with the help of moldings, which...

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Abstract

An electromotor has an external stator, and a ventilator vessel which is used to produce a cooling air flow for self-ventilation of the electromotor. In order to improve the cooling of an electromotors, it is proposed to use a ventilator vessel to help direct an air flow along the outer surface of the motor housing, through the inside of the housing of the electromotor and through an air gap formed between the motor housing wall and ventilator vessel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a U.S. national stage application of International Application No. PCT / EP2005 / 052941 filed Jun. 23, 2005, which designates the United States of America, and claims priority to European application number 04018133.1 filed Jul. 30, 2004, the contents of which are hereby incorporated by reference in their entirety.TECHNICAL FIELD[0002]The invention relates to an electromotor with a fixed external stator, an internal rotor and devices for self-ventilation, for example for use as a radiator ventilator drive in a motor vehicle.BACKGROUND[0003]For the safe operation of electromotors, the materials used must not become overheated in the given operating conditions. One must make sure that no overheating occurs when the electromotor is run with maximum dissipation at the ambient temperature. To disregard this can result in the life of the electromotor being shortened or to a complete breakdown of the electromotor.[0004]Therefore...

Claims

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Application Information

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IPC IPC(8): H02K9/06F04D25/08H02K9/14
CPCF04D25/082H02K9/14H02K9/06Y10T29/49012F04D29/5806
Inventor DE FILIPPIS, PIETROEGERLAND, MARKUSKEMMER, DETLEFMCLENNAN, PAUL STEPHENREDELBERGER, HARALD
Owner BROSE FAHRZEUGTEILE GMBH & CO KG HALLSTADT (DE)
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